'use strict';

function get_letter_interval(number_a, number_b) {
  let arr=[];
  if(number_a < number_b){
    for(let i=number_a;i<=number_b;i++){
      arr.push(String.fromCharCode(i+96));
    }
  }
  else if(number_a > number_b){
    for(let i=number_a;i>=number_b;i--){
      arr.push(String.fromCharCode(i+96));
    }
  }
  else {
    arr.push(String.fromCharCode(number_a+96));
  }
  return arr;
}

module.exports = get_letter_interval;
